US20130252489A1 - Crimped terminal attached electric wire and method of crimping crimped terminal to electric wire - Google Patents
Crimped terminal attached electric wire and method of crimping crimped terminal to electric wire Download PDFInfo
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- US20130252489A1 US20130252489A1 US13/835,546 US201313835546A US2013252489A1 US 20130252489 A1 US20130252489 A1 US 20130252489A1 US 201313835546 A US201313835546 A US 201313835546A US 2013252489 A1 US2013252489 A1 US 2013252489A1
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- Prior art keywords
- conductor
- crimping
- crimped
- electric wire
- crimped terminal
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/10—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation
- H01R4/18—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/04—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for forming connections by deformation, e.g. crimping tool
- H01R43/048—Crimping apparatus or processes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/10—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/10—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation
- H01R4/18—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping
- H01R4/183—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping for cylindrical elongated bodies, e.g. cables having circular cross-section
- H01R4/184—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping for cylindrical elongated bodies, e.g. cables having circular cross-section comprising a U-shaped wire-receiving portion
- H01R4/185—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping for cylindrical elongated bodies, e.g. cables having circular cross-section comprising a U-shaped wire-receiving portion combined with a U-shaped insulation-receiving portion
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
- Y10T29/49174—Assembling terminal to elongated conductor
- Y10T29/49181—Assembling terminal to elongated conductor by deforming
- Y10T29/49185—Assembling terminal to elongated conductor by deforming of terminal
Definitions
- the present invention relates to a crimped terminal attached electric wire which has an electric wire, which is made by covering a conductor part with an insulative coating, and a crimped terminal including a conductor crimping part which is crimped to the conductor part, and a method of crimping the crimped terminal to the electric wire.
- a crimped terminal attached electric wire which has an electric wire, which is made by covering a conductor part with an insulative coating, and a crimped terminal including a conductor crimping part which is crimped to the conductor part when a pair of crimping strip parts form a joint along the extending direction of the conductor part.
- the conductor crimping part of the crimped terminal which becomes a part that is crimped to the conductor part, and the conductor part are expanded in the extending direction of the conductor part due to the load for crimping.
- the expanding amount of the conductor crimping part is different from that of the conductor part, when, for example, insulative or conductive material is applied to the crimping part to ensure the connection stability, it is necessary to stabilize the position of the conductor crimping part relative to the conductor part in the extending direction of the conductor part after the conductor crimping part has been crimped to the conductor part.
- a crimped terminal attached electric wire is proposed, for example, in a patent document 1 in which wire barrel strips (conductor crimping parts) are separately formed in the extending direction of the conductor part to control the expanding of the wire barrel strips.
- a strong crimping part which is crimped with a high pressure to be highly compressed, is formed at the front side of a cut portion among the wire barrel strips by a first step, and a weak crimping part, which is crimped with a low pressure to be lowly compressed, is formed at the back side of the cut portion among the wire barrel strips by a second step.
- the present invention is made in view of the above situation, and the object of the present invention is to provide a crimped terminal attached electric wire and a method of crimping a crimped terminal to an electric wire so that a decrease of the connection stability of the crimped terminal and the electric wire can be prevented.
- a crimped terminal attached electric wire comprising: an electric wire, which is made by covering a conductor part with an insulative coating; and a crimped terminal including a conductor crimping part which is crimped to the conductor part when a pair of crimping strip parts form a joint along the extending direction of the conductor part, wherein the conductor crimping part is swelled in a direction perpendicular to the extending direction of the conductor part, and is formed into a barrel form while the joint is the only joint, when the conductor crimping part is crimped to the conductor part.
- the conductor crimping part when the conductor crimping part is crimped to the conductor part, the conductor crimping part is swelled in the direction perpendicular to the extending direction of the conductor part, and is formed into a barrel form while the joint is the only joint. Therefore, since the conductor crimping part and the conductor part are expanded in the direction perpendicular to the extending direction of the conductor part, the expanding quantities of the conductor crimping part and the conductor part in the extending direction are prevented, and the position of the conductor crimping part relative to the conductor part in the extending direction of the conductor part is stabilized. Besides, since the necessary portion where the joint is formed is limited to a minimum, a decrease of the strength is prevented. As a result, a decrease of the connection stability of the crimped terminal and the electric wire can be prevented.
- the method of crimping the crimped terminal to the electric wire according to the second aspect of the present invention includes a crimping step in which the conductor crimping part is swelled in the direction perpendicular to the extending direction of the conductor part, and is crimped into a barrel form while the joint is the only joint. Therefore, since the conductor crimping part and the conductor part are expanded in the direction perpendicular to the extending direction of the conductor part, the expanding quantities of the conductor crimping part and the conductor part in the extending direction are prevented, and the position of the conductor crimping part relative to the conductor part in the extending direction of the conductor part is stabilized. Besides, since the necessary portion where the joint is formed is limited to a minimum, a decrease of the strength is prevented. As a result, a decrease of the connection stability of the crimped terminal and the electric wire can be prevented.
- the method of crimping the crimped terminal to the electric wire since the crimping of the conductor crimping part is completed by one crimping when the conductor crimping part is crimped to the conductor part, the number of crimping times can be prevented from increasing. Besides, the management of the molds becomes easy because the number of the molds for crimping can be prevented from increasing. Further, the variation of the shape after the conductor crimping part has been crimped can be reduced.
- FIG. 1 is a top view of a crimped terminal attached electric wire according to an embodiment of the present invention.
- FIG. 2 is a top view which shows a section of part of the crimped terminal attached electric wire shown in FIG. 1 .
- FIGS. 3A to 3C are figures showing a flow of steps of crimping the crimped terminal to the electric wire.
- FIGS. 4A and 4B are figures showing the flow of the steps of crimping in FIGS. 3A to 3C by using a section perpendicular to the extending direction of a conductor part.
- FIG. 5 is a perspective view of an upper mold shown in FIGS. 3A to 3C .
- FIG. 6 is a figure, which is viewed from below, of the upper mold shown in FIG. 5 .
- FIG. 7 is a perspective view which shows an upper mold which is a variation of the upper mold shown in FIG. 5 .
- FIG. 8 is a figure, which is viewed from below, of the upper mold shown in FIG. 7 .
- FIGS. 9A to 9C are figures showing a flow of steps of crimping the crimped terminal to the electric wire according to another example.
- FIG. 1 is a top view of a crimped terminal attached electric wire 1 according to an embodiment of the present invention.
- FIG. 2 is a top view which shows a section of part of the crimped terminal attached electric wire 1 shown in 1 .
- the crimped terminal attached electric wire 1 has an electric wire 10 which is made by covering a conductor part 11 with an insulative coating 12 , and a crimped terminal 20 including a conductor crimping part 22 which is crimped to the conductor part 11 so that a pair of crimped strip parts 22 b form a joint 22 c along the extending direction of the conductor part 11 .
- the electric wire 10 is made by covering the conductor part 11 , which is made by bundling a plurality of metal strands 10 a , with the insulative coating 12 .
- the metal strands 10 a are made of, for example, aluminum material, and a plurality of the metal strands 10 a are bundled to function as the conductor part 11 .
- the insulative coating 12 is made of insulative materials such as synthetic resin, and protects the conductor part 11 so that the conductor part 11 can be insulated by being formed to cover the circumference of the conductor part 11 .
- the electric wire 10 is so formed that the crimped terminal 20 is connected to the conductor part 11 that is exposed by removing the insulative coating 12 at a terminal part 10 a of the electric wire 10 .
- the crimped terminal 20 is formed into a predetermined shape by forging with metal molds and bending a flat plate of, for example, copper alloy into the predetermined shape.
- the crimped terminal 20 is a female terminal, and has a mating connecting part 21 which becomes a part connecting with a mating connecting point not shown in the figure, a conductor crimping part 22 which is crimped to the exposed conductor part 11 , and an insulative coating crimping part 23 which is crimped to the insulative coating 12 of the electric wire 10 .
- the mating connecting part 21 has a box-like shape, and an elastic contact strip not shown in the figure is formed inside the mating connecting part 21 .
- the mating connecting part 21 is a part that is connected to a male terminal, which is not shown in the figure and becomes a mating connecting terminal, through the elastic contact strip.
- the conductor crimping part 22 is formed between the mating connecting part 21 and the insulative coating crimping part 23 , and is a part where the crimped terminal 20 and the conductor part 11 are connected.
- the conductor crimping part 22 has a base 22 a including a wall that forms a bottom surface, and the pair of crimped strip parts 22 b which are formed when two edges of the base 22 a are raised into a strip form.
- the pair of crimped strip parts 22 b are crimped to the conductor part 11 by being bent inwardly by using a jig for crimping.
- An upper mold 30 to be described below and referred to as a crimper and a lower mold 40 referred to as an anvil are used as the jig for crimping, and the conductor crimping part 22 is crimped to the conductor part 11 when the conductor crimping part 22 is crushed by the upper mold 30 and the lower mold 40 into a predetermined shape.
- the conductor crimping part 22 When the conductor crimping part 22 is crimped to the conductor part 11 , as shown with the arrows D in FIG. 1 , the conductor crimping part 22 is swelled in a direction perpendicular to the extending direction of the conductor part 11 , and is formed into a barrel form while the joint 22 c is the only joint. That is, the conductor crimping part 22 is formed to be expanded in the direction perpendicular to the extending direction of the conductor part 11 .
- the conductor part 11 crimped by the conductor crimping part 22 follows the inside shape of the conductor crimping part 22 , and is expanded in the direction perpendicular to the extending direction.
- both the conductor crimping part 22 and the conductor part 11 are expanded in the direction perpendicular to the extending direction of the conductor part 11 , the expanding amounts in the extending direction of the conductor part 11 are controlled.
- the insulative coating crimping part 23 forms an end opposite to the mating connecting part 21 of the crimped terminal 20 , and is a part which holds the electric wire 10 by being crimped to the insulative coating 12 .
- the insulative coating crimping part 23 has a base 23 a which follows the base 22 a of the conductor crimping part 22 , and a pair of crimping strip parts 23 b which are formed when two edges of the base 23 a are raised.
- the pair of crimping strip parts 23 b are crimped to the insulative coating 12 by being bent inwardly by using a jig for crimping not shown in the figure.
- FIGS. 3A to 3C are figures showing a flow of steps of crimping the crimped terminal 20 to the electric wire 10 .
- FIGS. 4A and 4B are figures showing the flow of the steps of crimping in FIG. 3 by using a section perpendicular to the extending direction of the conductor part 11 .
- FIG. 5 is a perspective view of the upper mold 30 shown in FIGS. 3A and 3B .
- FIG. 6 is a figure, which is viewed from below, of the upper mold 30 shown in FIG. 5 .
- FIG. 7 is a perspective view which shows an upper mold which is a variation of the upper mold shown in FIG. 5 .
- FIG. 8 is a figure, which is viewed from below, of the upper mold 30 shown in FIG. 7 .
- the operation of crimping the crimped terminal 20 to the electric wire 10 is performed by an operator who operates the upper mold 30 and the lower mold 40 by using, for example, a crimping device not shown in the figure.
- the operator sets the crimped terminal 20 on the lower mold 40 when the conductor part 11 is carried on the bottom wall 22 a of the crimped terminal 20 , and makes the upper mold 30 drop from above the conductor crimping part 22 (refer to FIGS. 3A and 4A ).
- the upper mold 30 has an arch shape which opens towards the lower mold 40 , and the arch inside surface becomes guiding surfaces 32 for crushing the conductor crimping part 22 into a barrel form.
- the guiding surfaces 32 are so formed that the distance between a pair of arch foot parts 31 is enlarged in some areas. More specifically, as shown in FIG.
- the guiding surface 32 has variable-distance guiding surface parts 32 a which are slanted so that the distance between the arch foot parts 31 increases gradually from two end surfaces 30 a of the upper mold 30 towards the inside, and a uniform-distance guiding surface 32 b which is so provided that an area of a certain width in which the distance between the arch foot parts 31 becomes maximum is formed between the variable-distance guiding surface parts 32 a between the two end surfaces 30 a.
- the lower mold 40 has a generally cubical shape, and the top surface of the lower mold 40 on which the conductor crimping part 22 is carried becomes a curved guiding surface 41 for crushing the conductor crimping part 22 into a barrel form.
- the upper mold 30 does not have the uniform-distance guiding surface 32 b.
- the crimping is completed (refer to FIGS. 3B , 3 C and 4 B).
- the conductor crimping part 22 is molded into a barrel form and is crimped to the conductor part 11 .
- the expansions of the conductor crimping part 22 and the conductor part 11 in the extending direction of conductor part 11 are converted into the expansions in the direction perpendicular to the extending direction of the conductor part 11 . Since there is only one joint 22 c in the conductor crimping part 22 , the crimping of the conductor crimping part 22 is completed by one crimping.
- the conductor crimping part 22 when the conductor crimping part 22 is crimped to the conductor part 11 , the conductor crimping part 22 is swelled in the direction perpendicular to the extending direction of the conductor part 11 , and is formed into a barrel form while the joint 22 c is the only joint.
- the conductor crimping part 22 and the conductor part 11 are expanded in the direction perpendicular to the extending direction of the conductor part 11 , the expanding quantities of the conductor crimping part 22 and the conductor part 11 in the extending direction are prevented, and the position of the conductor crimping part 22 relative to the conductor part 11 in the extending direction of the conductor part 11 is stabilized. Besides, since the necessary portion where the joint 22 c is formed is limited to a minimum, a decrease of the strength is prevented. As a result, a decrease of the connection stability of the crimped terminal 20 and the electric wire 10 can be prevented.
- the method of crimping the crimped terminal to the electric wire includes a crimping step in which the conductor crimping part 22 is crimped to the conductor part 11 into a barrel form which assumes the axis of the conductor part 11 as an axis. Therefore, since the conductor crimping part 22 and the conductor part 11 are expanded in the direction perpendicular to the extending direction of the conductor part 11 , the expanding quantities of the conductor crimping part 22 and the conductor part 11 in the extending direction are prevented, and the position of the conductor crimping part 22 relative to the conductor part 11 in the extending direction of the conductor part 11 is stabilized. As a result, the connection stability of the crimped terminal and the electric wire can be improved.
- the method of crimping the crimped terminal to the electric wire since the crimping of the conductor crimping part 22 is completed by one crimping when the conductor crimping part 22 is crimped to the conductor part 11 , the number of crimping times can be prevented from increasing. Besides, the management of the molds becomes easy because the number of the molds for crimping can be prevented from increasing. Further, the variation of the shape after the conductor crimping part 22 has been crimped can be reduced.
- the conductor part 11 is made by bundling a plurality of metal strands 11 a , but the invention is not limited to this and it is also possible that the conductor part 11 is made of a single core strand.
- the crimped terminal 20 is a female terminal, but the invention is not limited to this and it is also possible to use other crimped terminals as long as the crimped terminal is crimped to the conductor part of the electric wire.
- a male terminal may be used.
- the insulative coating crimping part 23 is included, but the invention is not limited to this and it is also possible that the insulative coating crimping part 23 is not included.
- the conductor crimping part 22 is swelled in the directions perpendicular to the extending direction of the conductor part 11 , and is formed into a barrel form in all directions perpendicular to the extending direction.
- the conductor crimping part 22 may not be swelled.
- FIG. 9 One example is shown in FIG. 9 .
- the conductor crimping part 22 is formed flatly and having a cylindrical shape. In this case, since the necessary portion where the joint is formed is limited to a minimum, a decrease of the strength is prevented.
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- Manufacturing Of Electrical Connectors (AREA)
Abstract
Description
- The present invention relates to a crimped terminal attached electric wire which has an electric wire, which is made by covering a conductor part with an insulative coating, and a crimped terminal including a conductor crimping part which is crimped to the conductor part, and a method of crimping the crimped terminal to the electric wire.
- Traditionally, there is a crimped terminal attached electric wire which has an electric wire, which is made by covering a conductor part with an insulative coating, and a crimped terminal including a conductor crimping part which is crimped to the conductor part when a pair of crimping strip parts form a joint along the extending direction of the conductor part. In such a crimped terminal attached electric wire, the conductor crimping part of the crimped terminal, which becomes a part that is crimped to the conductor part, and the conductor part are expanded in the extending direction of the conductor part due to the load for crimping. Since the expanding amount of the conductor crimping part is different from that of the conductor part, when, for example, insulative or conductive material is applied to the crimping part to ensure the connection stability, it is necessary to stabilize the position of the conductor crimping part relative to the conductor part in the extending direction of the conductor part after the conductor crimping part has been crimped to the conductor part.
- To solve such a problem, a crimped terminal attached electric wire is proposed, for example, in a
patent document 1 in which wire barrel strips (conductor crimping parts) are separately formed in the extending direction of the conductor part to control the expanding of the wire barrel strips. - In the crimped terminal attached electric wire described in the
patent document 1, a strong crimping part, which is crimped with a high pressure to be highly compressed, is formed at the front side of a cut portion among the wire barrel strips by a first step, and a weak crimping part, which is crimped with a low pressure to be lowly compressed, is formed at the back side of the cut portion among the wire barrel strips by a second step. -
- [Patent document 1] Japan Patent Publication No. 2010-97781
- However, in the crimped terminal attached electric wire described in the
patent document 1, because the cut portion for separating the wire barrel strips is formed, the strength of the wire barrel strips is decreased, and, as a result, the connection stability of the crimped terminal and the conductor part might decrease. - The present invention is made in view of the above situation, and the object of the present invention is to provide a crimped terminal attached electric wire and a method of crimping a crimped terminal to an electric wire so that a decrease of the connection stability of the crimped terminal and the electric wire can be prevented.
- It is therefore a first aspect of the invention to provide a crimped terminal attached electric wire comprising: an electric wire, which is made by covering a conductor part with an insulative coating; and a crimped terminal including a conductor crimping part which is crimped to the conductor part when a pair of crimping strip parts form a joint along the extending direction of the conductor part, wherein the conductor crimping part is swelled in a direction perpendicular to the extending direction of the conductor part, and is formed into a barrel form while the joint is the only joint, when the conductor crimping part is crimped to the conductor part.
- It is a second aspect of the invention to provide a method of crimping a crimped terminal to an electric wire, the crimped terminal attached electric wire comprising: the electric wire, which is made by covering a conductor part with an insulative coating; and the crimped terminal including a conductor crimping part which is crimped to the conductor part when a pair of crimping strip parts form a joint along the extending direction of the conductor part, including a crimping step in which the conductor crimping part is swelled in the direction perpendicular to the extending direction of the conductor part, and is crimped into a barrel form while the joint is the only joint.
- It is a third aspect of the invention to provide a method of crimping the crimped terminal to the electric wire, wherein the crimping in the crimping step is the only crimping to complete the conductor crimping part crimped to the conductor part.
- For the crimped terminal attached electric wire according to the first aspect of the present invention, when the conductor crimping part is crimped to the conductor part, the conductor crimping part is swelled in the direction perpendicular to the extending direction of the conductor part, and is formed into a barrel form while the joint is the only joint. Therefore, since the conductor crimping part and the conductor part are expanded in the direction perpendicular to the extending direction of the conductor part, the expanding quantities of the conductor crimping part and the conductor part in the extending direction are prevented, and the position of the conductor crimping part relative to the conductor part in the extending direction of the conductor part is stabilized. Besides, since the necessary portion where the joint is formed is limited to a minimum, a decrease of the strength is prevented. As a result, a decrease of the connection stability of the crimped terminal and the electric wire can be prevented.
- The method of crimping the crimped terminal to the electric wire according to the second aspect of the present invention includes a crimping step in which the conductor crimping part is swelled in the direction perpendicular to the extending direction of the conductor part, and is crimped into a barrel form while the joint is the only joint. Therefore, since the conductor crimping part and the conductor part are expanded in the direction perpendicular to the extending direction of the conductor part, the expanding quantities of the conductor crimping part and the conductor part in the extending direction are prevented, and the position of the conductor crimping part relative to the conductor part in the extending direction of the conductor part is stabilized. Besides, since the necessary portion where the joint is formed is limited to a minimum, a decrease of the strength is prevented. As a result, a decrease of the connection stability of the crimped terminal and the electric wire can be prevented.
- With the method of crimping the crimped terminal to the electric wire according to the third aspect of the present invention, since the crimping of the conductor crimping part is completed by one crimping when the conductor crimping part is crimped to the conductor part, the number of crimping times can be prevented from increasing. Besides, the management of the molds becomes easy because the number of the molds for crimping can be prevented from increasing. Further, the variation of the shape after the conductor crimping part has been crimped can be reduced.
-
FIG. 1 is a top view of a crimped terminal attached electric wire according to an embodiment of the present invention. -
FIG. 2 is a top view which shows a section of part of the crimped terminal attached electric wire shown inFIG. 1 . -
FIGS. 3A to 3C are figures showing a flow of steps of crimping the crimped terminal to the electric wire. -
FIGS. 4A and 4B are figures showing the flow of the steps of crimping inFIGS. 3A to 3C by using a section perpendicular to the extending direction of a conductor part. -
FIG. 5 is a perspective view of an upper mold shown inFIGS. 3A to 3C . -
FIG. 6 is a figure, which is viewed from below, of the upper mold shown inFIG. 5 . -
FIG. 7 is a perspective view which shows an upper mold which is a variation of the upper mold shown inFIG. 5 . -
FIG. 8 is a figure, which is viewed from below, of the upper mold shown inFIG. 7 . -
FIGS. 9A to 9C are figures showing a flow of steps of crimping the crimped terminal to the electric wire according to another example. - Preferred embodiments of crimped terminal attached electric wires and methods of crimping a crimped terminal to an electric wire according to the present invention will be described in detail with reference to the figures as follows.
-
FIG. 1 is a top view of a crimped terminal attachedelectric wire 1 according to an embodiment of the present invention.FIG. 2 is a top view which shows a section of part of the crimped terminal attachedelectric wire 1 shown in 1. - The crimped terminal attached
electric wire 1 according to the embodiment of the present invention has anelectric wire 10 which is made by covering aconductor part 11 with aninsulative coating 12, and acrimped terminal 20 including aconductor crimping part 22 which is crimped to theconductor part 11 so that a pair ofcrimped strip parts 22 b form ajoint 22 c along the extending direction of theconductor part 11. - First, the
electric wire 10 is described. - The
electric wire 10 is made by covering theconductor part 11, which is made by bundling a plurality ofmetal strands 10 a, with theinsulative coating 12. - The
metal strands 10 a are made of, for example, aluminum material, and a plurality of themetal strands 10 a are bundled to function as theconductor part 11. - The
insulative coating 12 is made of insulative materials such as synthetic resin, and protects theconductor part 11 so that theconductor part 11 can be insulated by being formed to cover the circumference of theconductor part 11. - The
electric wire 10 is so formed that the crimpedterminal 20 is connected to theconductor part 11 that is exposed by removing theinsulative coating 12 at aterminal part 10 a of theelectric wire 10. - Next, the
crimped terminal 20 is described. - The crimped
terminal 20 is formed into a predetermined shape by forging with metal molds and bending a flat plate of, for example, copper alloy into the predetermined shape. Thecrimped terminal 20 is a female terminal, and has amating connecting part 21 which becomes a part connecting with a mating connecting point not shown in the figure, aconductor crimping part 22 which is crimped to the exposedconductor part 11, and an insulativecoating crimping part 23 which is crimped to theinsulative coating 12 of theelectric wire 10. - The
mating connecting part 21 has a box-like shape, and an elastic contact strip not shown in the figure is formed inside themating connecting part 21. Themating connecting part 21 is a part that is connected to a male terminal, which is not shown in the figure and becomes a mating connecting terminal, through the elastic contact strip. - The
conductor crimping part 22 is formed between themating connecting part 21 and the insulativecoating crimping part 23, and is a part where thecrimped terminal 20 and theconductor part 11 are connected. Theconductor crimping part 22 has abase 22 a including a wall that forms a bottom surface, and the pair of crimpedstrip parts 22 b which are formed when two edges of thebase 22 a are raised into a strip form. The pair of crimpedstrip parts 22 b are crimped to theconductor part 11 by being bent inwardly by using a jig for crimping. - An
upper mold 30 to be described below and referred to as a crimper and alower mold 40 referred to as an anvil are used as the jig for crimping, and theconductor crimping part 22 is crimped to theconductor part 11 when theconductor crimping part 22 is crushed by theupper mold 30 and thelower mold 40 into a predetermined shape. - When the
conductor crimping part 22 is crimped to theconductor part 11, as shown with the arrows D inFIG. 1 , theconductor crimping part 22 is swelled in a direction perpendicular to the extending direction of theconductor part 11, and is formed into a barrel form while thejoint 22 c is the only joint. That is, theconductor crimping part 22 is formed to be expanded in the direction perpendicular to the extending direction of theconductor part 11. - The
conductor part 11 crimped by theconductor crimping part 22 follows the inside shape of theconductor crimping part 22, and is expanded in the direction perpendicular to the extending direction. - That is, since both the
conductor crimping part 22 and theconductor part 11 are expanded in the direction perpendicular to the extending direction of theconductor part 11, the expanding amounts in the extending direction of theconductor part 11 are controlled. - Besides, since the necessary portion where the joint is formed is limited to a minimum, a decrease of the strength of the
conductor crimping part 22 is prevented. - The insulative
coating crimping part 23 forms an end opposite to themating connecting part 21 of the crimpedterminal 20, and is a part which holds theelectric wire 10 by being crimped to theinsulative coating 12. The insulativecoating crimping part 23 has a base 23 a which follows the base 22 a of theconductor crimping part 22, and a pair of crimpingstrip parts 23 b which are formed when two edges of the base 23 a are raised. The pair of crimpingstrip parts 23 b are crimped to theinsulative coating 12 by being bent inwardly by using a jig for crimping not shown in the figure. - Next, steps of crimping the crimped
terminal 20 to theelectric wire 10 are described by usingFIGS. 3A to 6 .FIGS. 3A to 3C are figures showing a flow of steps of crimping the crimpedterminal 20 to theelectric wire 10.FIGS. 4A and 4B are figures showing the flow of the steps of crimping inFIG. 3 by using a section perpendicular to the extending direction of theconductor part 11.FIG. 5 is a perspective view of theupper mold 30 shown inFIGS. 3A and 3B .FIG. 6 is a figure, which is viewed from below, of theupper mold 30 shown inFIG. 5 .FIG. 7 is a perspective view which shows an upper mold which is a variation of the upper mold shown inFIG. 5 .FIG. 8 is a figure, which is viewed from below, of theupper mold 30 shown inFIG. 7 . - The operation of crimping the crimped
terminal 20 to theelectric wire 10 is performed by an operator who operates theupper mold 30 and thelower mold 40 by using, for example, a crimping device not shown in the figure. - Since the steps of crimping the crimped
terminal 20 to theinsulative coating 12 are typical crimping steps, the related explanation is omitted here. - First, the operator sets the crimped
terminal 20 on thelower mold 40 when theconductor part 11 is carried on thebottom wall 22 a of the crimpedterminal 20, and makes theupper mold 30 drop from above the conductor crimping part 22 (refer toFIGS. 3A and 4A ). - Below, the
upper mold 30 and thelower mold 40 are described in detail. - As shown in
FIGS. 5 and 6 , theupper mold 30 has an arch shape which opens towards thelower mold 40, and the arch inside surface becomes guidingsurfaces 32 for crushing theconductor crimping part 22 into a barrel form. The guiding surfaces 32 are so formed that the distance between a pair ofarch foot parts 31 is enlarged in some areas. More specifically, as shown inFIG. 6 , the guidingsurface 32 has variable-distance guidingsurface parts 32 a which are slanted so that the distance between thearch foot parts 31 increases gradually from twoend surfaces 30 a of theupper mold 30 towards the inside, and a uniform-distance guiding surface 32 b which is so provided that an area of a certain width in which the distance between thearch foot parts 31 becomes maximum is formed between the variable-distance guidingsurface parts 32 a between the twoend surfaces 30 a. - As shown in
FIGS. 3A and 4A , thelower mold 40 has a generally cubical shape, and the top surface of thelower mold 40 on which theconductor crimping part 22 is carried becomes acurved guiding surface 41 for crushing theconductor crimping part 22 into a barrel form. - As shown in
FIGS. 7 and 8 , it is also possible that theupper mold 30 does not have the uniform-distance guiding surface 32 b. - As such an
upper mold 30 is dropped towards thelower mold 40 to sandwich theconductor part 11, the pair of crimpingstrip parts 22 b of theconductor crimping parts 22 are bent to be slid on the guiding surfaces 32, the circumference of theconductor part 11 is enclosed into a barrel form and the joint 22 c is formed along the extending direction of theconductor part 11. - Then, when the operator makes the
upper mold 30 drop to the lowest position in the movement for crimping, the crimping is completed (refer toFIGS. 3B , 3C and 4B). Thereby, theconductor crimping part 22 is molded into a barrel form and is crimped to theconductor part 11. Thereby, the expansions of theconductor crimping part 22 and theconductor part 11 in the extending direction ofconductor part 11 are converted into the expansions in the direction perpendicular to the extending direction of theconductor part 11. Since there is only one joint 22 c in theconductor crimping part 22, the crimping of theconductor crimping part 22 is completed by one crimping. - For the crimped terminal attached
electric wire 1 according to the embodiment of the present invention, when theconductor crimping part 22 is crimped to theconductor part 11, theconductor crimping part 22 is swelled in the direction perpendicular to the extending direction of theconductor part 11, and is formed into a barrel form while the joint 22 c is the only joint. Therefore, since theconductor crimping part 22 and theconductor part 11 are expanded in the direction perpendicular to the extending direction of theconductor part 11, the expanding quantities of theconductor crimping part 22 and theconductor part 11 in the extending direction are prevented, and the position of theconductor crimping part 22 relative to theconductor part 11 in the extending direction of theconductor part 11 is stabilized. Besides, since the necessary portion where the joint 22 c is formed is limited to a minimum, a decrease of the strength is prevented. As a result, a decrease of the connection stability of the crimpedterminal 20 and theelectric wire 10 can be prevented. - The method of crimping the crimped terminal to the electric wire according to the embodiment of the present invention includes a crimping step in which the
conductor crimping part 22 is crimped to theconductor part 11 into a barrel form which assumes the axis of theconductor part 11 as an axis. Therefore, since theconductor crimping part 22 and theconductor part 11 are expanded in the direction perpendicular to the extending direction of theconductor part 11, the expanding quantities of theconductor crimping part 22 and theconductor part 11 in the extending direction are prevented, and the position of theconductor crimping part 22 relative to theconductor part 11 in the extending direction of theconductor part 11 is stabilized. As a result, the connection stability of the crimped terminal and the electric wire can be improved. - With the method of crimping the crimped terminal to the electric wire according to the embodiment of the present invention, since the crimping of the
conductor crimping part 22 is completed by one crimping when theconductor crimping part 22 is crimped to theconductor part 11, the number of crimping times can be prevented from increasing. Besides, the management of the molds becomes easy because the number of the molds for crimping can be prevented from increasing. Further, the variation of the shape after theconductor crimping part 22 has been crimped can be reduced. - It is exemplified in the crimped terminal attached
electric wire 1 and the method of crimping the crimped terminal to the electric wire according to the embodiment of the present invention that theconductor part 11 is made by bundling a plurality ofmetal strands 11 a, but the invention is not limited to this and it is also possible that theconductor part 11 is made of a single core strand. - It is exemplified in the crimped terminal attached
electric wire 1 and the method of crimping the crimped terminal to the electric wire according to the embodiment of the present invention that the crimpedterminal 20 is a female terminal, but the invention is not limited to this and it is also possible to use other crimped terminals as long as the crimped terminal is crimped to the conductor part of the electric wire. For example, a male terminal may be used. - It is exemplified in the crimped terminal attached
electric wire 1 and the method of crimping the crimped terminal to the electric wire according to the embodiment of the present invention that the insulativecoating crimping part 23 is included, but the invention is not limited to this and it is also possible that the insulativecoating crimping part 23 is not included. - It is exemplified in the crimped terminal attached
electric wire 1 and the method of crimping the crimped terminal to the electric wire according to the embodiment of the present invention that theconductor crimping part 22 is swelled in the directions perpendicular to the extending direction of theconductor part 11, and is formed into a barrel form in all directions perpendicular to the extending direction. However, theconductor crimping part 22 may not be swelled. One example is shown inFIG. 9 . In this example, theconductor crimping part 22 is formed flatly and having a cylindrical shape. In this case, since the necessary portion where the joint is formed is limited to a minimum, a decrease of the strength is prevented. - The invention accomplished by the inventor is described in detail based on the above embodiment of the invention, but the present invention is not limited to the above embodiment and can be modified in various ways without departing from the spirit of the invention.
Claims (4)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2012063177A JP5953590B2 (en) | 2012-03-21 | 2012-03-21 | Electric wire with crimp terminal and method for crimping crimp terminal to electric wire |
JP2012-063177 | 2012-03-21 |
Publications (2)
Publication Number | Publication Date |
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US20130252489A1 true US20130252489A1 (en) | 2013-09-26 |
US9088079B2 US9088079B2 (en) | 2015-07-21 |
Family
ID=49112437
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Application Number | Title | Priority Date | Filing Date |
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US13/835,546 Active 2033-07-29 US9088079B2 (en) | 2012-03-21 | 2013-03-15 | Crimped terminal attached electric wire and method of crimping crimped terminal to electric wire |
Country Status (4)
Country | Link |
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US (1) | US9088079B2 (en) |
JP (1) | JP5953590B2 (en) |
CN (1) | CN103326143A (en) |
DE (1) | DE102013204899A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10483657B2 (en) | 2016-05-31 | 2019-11-19 | Yazaki Corporation | Manufacturing method for electric wire having terminal |
US11152718B2 (en) * | 2018-02-15 | 2021-10-19 | Autonetworks Technologies, Ltd. | Electrical cable including terminal having pressing portion that presses holding portion |
US20220336969A1 (en) * | 2021-04-14 | 2022-10-20 | Te Connectivity Germany Gmbh | Tool for Producing an Arrangement, Method for Producing the Arrangement Using the Tool, and Arrangement |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
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CN104091329B (en) | 2014-06-25 | 2017-02-15 | 清华大学 | Calibration method and device for CT image as well as CT system |
JP6421737B2 (en) * | 2015-10-21 | 2018-11-14 | 株式会社オートネットワーク技術研究所 | Manufacturing method of electric wire with terminal, crimping jig, and electric wire with terminal |
US11050168B2 (en) * | 2019-09-12 | 2021-06-29 | Lear Corporation | Crimping terminal with wire hook to loop wire |
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US5239749A (en) * | 1990-05-25 | 1993-08-31 | Yazaki Corporation | Press-connecting construction for construction cable and press-connecting method |
US20020058447A1 (en) * | 1999-02-26 | 2002-05-16 | Takayoshi Endo | Crimp-type terminal and method of producing crimp-type terminal |
US6942529B2 (en) * | 2002-12-13 | 2005-09-13 | Yazaki Corporation | Press-clamping terminal |
US20080283268A1 (en) * | 2005-07-29 | 2008-11-20 | Toagosei Co., Ltd | Method for Stopping Water of Earth Wire and Earth Wire |
US20090269970A1 (en) * | 2008-04-23 | 2009-10-29 | Yazaki Corporation | Terminal crimping structure |
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FR2859047A1 (en) * | 2003-08-19 | 2005-02-25 | Framatome Connectors Int | Improved electrical wire contact crimping method having outer shaft two stages deformed using die stamps with second crimping stage forming smaller localised gap size. |
JP2010062038A (en) * | 2008-09-04 | 2010-03-18 | Sumitomo Wiring Syst Ltd | Method of manufacturing electric wire with terminal metal fitting, die for terminal crimping, and terminal metal fitting |
JP2010097781A (en) | 2008-10-15 | 2010-04-30 | Autonetworks Technologies Ltd | Manufacturing method of electric wire with terminal fitting, and terminal crimping device |
JP5428789B2 (en) | 2008-11-19 | 2014-02-26 | 株式会社オートネットワーク技術研究所 | Electric wire with terminal fitting and method of manufacturing electric wire with terminal fitting |
-
2012
- 2012-03-21 JP JP2012063177A patent/JP5953590B2/en active Active
-
2013
- 2013-03-15 US US13/835,546 patent/US9088079B2/en active Active
- 2013-03-20 DE DE102013204899A patent/DE102013204899A1/en not_active Withdrawn
- 2013-03-21 CN CN2013100917919A patent/CN103326143A/en active Pending
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US5239749A (en) * | 1990-05-25 | 1993-08-31 | Yazaki Corporation | Press-connecting construction for construction cable and press-connecting method |
US20020058447A1 (en) * | 1999-02-26 | 2002-05-16 | Takayoshi Endo | Crimp-type terminal and method of producing crimp-type terminal |
US6942529B2 (en) * | 2002-12-13 | 2005-09-13 | Yazaki Corporation | Press-clamping terminal |
US20080283268A1 (en) * | 2005-07-29 | 2008-11-20 | Toagosei Co., Ltd | Method for Stopping Water of Earth Wire and Earth Wire |
US7985923B2 (en) * | 2007-01-23 | 2011-07-26 | Yazaki Corporation | Terminal crimping structure and terminal crimping method of crimping terminal to copper alloy wire and wire harness with the terminal crimping structure |
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US10483657B2 (en) | 2016-05-31 | 2019-11-19 | Yazaki Corporation | Manufacturing method for electric wire having terminal |
US11152718B2 (en) * | 2018-02-15 | 2021-10-19 | Autonetworks Technologies, Ltd. | Electrical cable including terminal having pressing portion that presses holding portion |
US20220336969A1 (en) * | 2021-04-14 | 2022-10-20 | Te Connectivity Germany Gmbh | Tool for Producing an Arrangement, Method for Producing the Arrangement Using the Tool, and Arrangement |
US11876330B2 (en) * | 2021-04-14 | 2024-01-16 | Te Connectivity Germany Gmbh | Tool for producing an arrangement composed of an electrical line and contact device |
Also Published As
Publication number | Publication date |
---|---|
DE102013204899A1 (en) | 2013-09-26 |
CN103326143A (en) | 2013-09-25 |
JP2013196921A (en) | 2013-09-30 |
US9088079B2 (en) | 2015-07-21 |
JP5953590B2 (en) | 2016-07-20 |
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